Added an FT notebook

Took my 4-point FT notebook from Chem310 to demonstrate how to teach complex mathematical analysis using the notebooks.
Added Machine Learn/SymPy/Interact NB

Found two new Notebooks on the web and added them to my list. The first is for machine learning with Scikit-learn, the second shows an interact widget with SymPy. These are as-is. No time to mark them up.
Change Machine Learning NB

I read about the Machine learning book on the web, and read a very negative review from one of the core devs. Decided to find a new example. This one from JVP.
Added PyMC example.

Found an example of PyMC on the web. Checks for Hot Hands in NBA free throws. Also does some parallel computing.